These rubble stabilisers solve a legecy problem affecting coral reefs, namely how to produce a solid substrate for coral to grow on, at an infitessimilly small

These rubble stabilisers solve a legecy problem affecting coral reefs, namely how to produce a solid substrate for coral to grow on, at an infitessimilly small relative scale. The problem is that they do little for the problem affecting coral reefs, namely warming waters and acidification. They're equivalent to nail clippers for a person with cancer.